Report Measurement and estimation of off-grid solar, hydro and biogas energy This report explains how IRENA approached the challenges of data collection and the methodologies used to produce the estimates of off-grid energy production and use. A brief overview of the data collected, followed by detailed tables of the off-grid data by country, technology and year is provided. View Report Source: IrenaPublished in: 2018 Last updated on: 20/12/2019